Ionic Compounds and Their Properties

The video tutorial explains how to write the chemical formula for cobalt(II) carbonate. It begins by identifying cobalt and carbonate, noting that carbonate is a polyatomic ion. The tutorial emphasizes the importance of charge balancing in ionic compounds, explaining that cobalt has a 2+ charge and carbonate has a 2- charge, which neutralize each other. The final formula is presented as CoCO3, with a step-by-step explanation of the process.

Which element is represented by the symbol 'Co' on the periodic table?

• Calcium

• Copper

• Cobalt

• Carbon

What type of ion is carbonate?

• Anion

• Cation

• Polyatomic ion

• Monatomic ion

What is the charge of the carbonate ion?

• 1+

• 2-

• 1-

• 2+

What is the charge of cobalt in cobalt(II) carbonate?

• 3+

• 2+

• 0

• 1+

Why must the charges in an ionic compound add up to zero?

• To make the compound acidic

• To make the compound stable

• To make the compound neutral

• To make the compound reactive

What is the final formula for cobalt(II) carbonate?

• Co3CO

• CoCO3

• Co2CO3

• Co(CO3)2